3-Dimensional Drawings, or Photographic or Pictorial Drawings. Isometric Drawing
3-Dimensional Drawings, or Photographic or Pictorial Drawings. Isometric Drawing
3-Dimensional Drawings, or Photographic or Pictorial Drawings. Isometric Drawing
H
H H
PURPOSE OF ISOMETRIC DRAWING IS TO UNDERSTAND
OVERALL SHAPE, SIZE & APPEARANCE OF AN OBJECT PRIOR TO IT’S PRODUCTION
SOME IMPORTANT TERMS:
The three lines AL, AD and AH, meeting at point A and making
1200 angles with each other are termed Isometric Axes.
A
The lines parallel to these axes are called Isometric Lines.
D
4
H 2 C H
4
1 3
2
CONSTRUCTION OF ISOM.SCALE.
0 From point A, with line AB draw 300 and
1
450 inclined lines AC & AD resp on AD.
450 Mark divisions of true length and from
0 300
A B each division-point draw vertical lines
Isometric scale [ Line AC ] upto AC line.
The divisions thus obtained on AC
required for Isometric Projection give lengths on isometric scale.
Isometric view if the Shape is
ISOMETRIC SHAPE
OF F.V. or T.V.
D
PLANE FIGURES H
RECTANGLE D
A D A
AS THESE ALL ARE
2-D FIGURES C C
WE REQUIRE ONLY TWO A
ISOMETRIC AXES.
B C B B
IF THE FIGURE IS FRONT VIEW, B
H & L AXES ARE REQUIRED. H
TRIANGLE 3 B
1 3
IF THE FIGURE IS TOP VIEW, D B 1
& L AXES ARE REQUIRED. A A
3
1
Shapes containing
Inclined lines should be 2 A 2 2
enclosed in a rectangle 4
H
as shown. PENTAGON E
E
Then first draw isom. of 1 4 1 D 4
that rectangle and then E
D
is. 1 3
3 A C
C
2 3 B B
B C 2 2
STUDY
Z
ILLUSTRATIONS
A B
3 4
D C
1
STUDY
Z
ILLUSTRATIONS
25 R
IF FRONT VIEW
100 MM
IF TOP VIEW
ISOMETRIC SHAPE IF F.V. IF T.V.
OF
PLANE FIGURES HEXAGON
IF THE FIGURE IS
FRONT VIEW, H & L
AXES ARE REQUIRED.
4
4
D
D E
E
1 3 1 3
A C
A C
B
2
B
2
STUDY
Z
ILLUSTRATIONS
ISOMETRIC VIEW OF
PENTAGONALL PRISM
LYING ON H.P.
4
H E
1 D
3
C
B
2
ISOMETRIC VIEW OF
HEXAGONAL PRISM
STANDING ON H.P.
STUDY
Z
ILLUSTRATIONS
CYLINDER STANDING ON H.P.
HALF CYLINDER
LYING ON H.P.
( with flat face // to H.P.)
ISOMETRIC VIEW OF
STUDY
Z A FRUSTOM OF SQUARE PYRAMID
ILLUSTRATIONS
STANDING ON H.P. ON IT’S LARGER BASE.
60
FV
X Y
40 20
TV
STUDY
ILLUSTRATION
SOLUTION STEPS:
60
FV
FIRST DRAW ISOMETRIC
OF IT’S BASE.
B
2 3
C
ISOMETRIC VIEW OF
STUDY A FRUSTOM OF CONE
Z
ILLUSTRATIONS STANDING ON H.P. ON IT’S LARGER BASE.
60
FV
X Y
40 20
TV
PROBLEM: A SQUARE PYRAMID OF 30 MM BASE SIDES AND
STUDY 50 MM LONG AXIS, IS CENTRALLY PLACED ON THE TOP OF A
Z
ILLUSTRATIONS CUBE OF 50 MM LONG EDGES.DRAW ISOMETRIC VIEW OF THE PAIR.
STUDY PROBLEM:
Z
ILLUSTRATIONS
A SQUARE PLATE IS PIERCED THROUGH CENTRALLY
BY A CYLINDER WHICH COMES OUT EQUALLY FROM BOTH FACES
OF PLATE. IT’S FV & TV ARE SHOWN. DRAW ISOMETRIC VIEW.
FV 30
10
30
30 D
50 +
50
TV
STUDY PROBLEM:
Z
ILLUSTRATIONS A CIRCULAR PLATE IS PIERCED THROUGH CENTRALLY
BY A SQUARE PYRAMID WHICH COMES OUT EQUALLY FROM BOTH FACES
OF PLATE. IT’S FV & TV ARE SHOWN. DRAW ISOMETRIC VIEW.
FV 30
10
30
40 SQUARE
60 D
TV
STUDY
Z
ILLUSTRATIONS F.V. & T.V. of an object are given. Draw it’s isometric view.
10
20
40
FV
40
X Y
TV
50 D 30 D
STUDY
Z
ILLUSTRATIONS ISOMETRIC PROJECTIONS OF SPHERE & HEMISPHERE
450 r
300 R r
Isom. Scale
r
P
C
r r
R C
R TO DRAW ISOMETRIC PROJECTION
R OF A HEMISPHERE
P r
P Adopt same procedure.
Draw lower semicircle only.
C = Center of Sphere. Then around ‘C’ construct
P = Point of contact Rhombus of Sides equal to
Isometric Diameter.
R = True Radius of Sphere For this use iso-scale.
r = Isometric Radius. Then construct ellipse in
TO DRAW ISOMETRIC PROJECTION OF A SPHERE this Rhombus as usual
1. FIRST DRAW ISOMETRIC OF SQUARE PLATE. And Complete
2. LOCATE IT’S CENTER. NAME IT P. Isometric-Projection
3. FROM PDRAW VERTICAL LINE UPWARD, LENGTH ‘ r mm’ of Hemi-sphere.
AND LOCATE CENTER OF SPHERE “C”
4. ‘C’ AS CENTER, WITH RADIUS ‘R’ DRAW CIRCLE.
THIS IS ISOMETRIC PROJECTION OF A SPHERE.
PROBLEM:
A HEMI-SPHERE IS CENTRALLY PLACED STUDY
ON THE TOP OF A FRUSTOM OF CONE. Z
ILLUSTRATIONS
DRAW ISOMETRIC PROJECTIONS OF THE ASSEMBLY.
r
50 D
R r
30 D
r
50
P
50 D
450
300
STUDY A SQUARE PYRAMID OF 40 MM BASE SIDES AND 60 MM AXIS
Z
ILLUSTRATIONS
IS CUT BY AN INCLINED SECTION PLANE THROUGH THE MID POINT
OF AXIS AS SHOWN.DRAW ISOMETRIC VIEW OF SECTION OF PYRAMID.
3’ 4’
3 1’2’
X Y
1 a d
1
4
2
o
3
b 2 c
STUDY
Z
ILLUSTRATIONS F.V. & T.V. of an object are given. Draw it’s isometric view.
50
O
X Y
20
25
O 25 20
STUDY
Z F.V. & T.V. of an object are given. Draw it’s isometric view.
ILLUSTRATIONS
35
FV
35
10
x y
O
10 20 30
40
70
TV
O
STUDY
Z F.V. & T.V. and S.V.of an object are given. Draw it’s isometric view
ILLUSTRATIONS
FV
30 10 30 SV
30
10
30
x y
FV SV
x y
10
40 60
40
TV
60
STUDY F.V. & T.V. and S.V.of an object are given. Draw it’s isometric view.
Z
ILLUSTRATIONS
ALL VIEWS IDENTICAL
FV SV
x y
10
40 60
40 TV
60
26
STUDY
Z
ILLUSTRATIONS
F.V. & T.V. and S.V.of an object are given. Draw it’s isometric view.
ORTHOGRAPHIC PROJECTIONS
20
20
20
x y
O 50
20
30
O
20 20 20
TOP VIEW
STUDY
Z
ILLUSTRATIONS
F.V. and S.V.of an object are given.
Draw it’s isometric view.
30 SQUARE
40 20
50
20
10
O 30
60
F.V.
S.V.
O
STUDY
Z
ILLUSTRATIONS
F.V. & T.V. of an object are given. Draw it’s isometric view.
FV
40
10
O 45
30 D
10
50
O
80
TV
STUDY F.V. & T.V. of an object are given. Draw it’s isometric view.
Z
ILLUSTRATIONS
30
FV
RECT.
SLOT
10 50
35
10
X Y
O
20 D
TV
60 D
30 D
O
STUDY
Z
ILLUSTRATIONS
F.V. and S.V.of an object are given.
Draw it’s isometric view.
HEX PART
30
20
20
40
20
O 50
20
15
O 30
100 60
F.V. and S.V.of an object are given.
Draw it’s isometric view.
10 10 15 STUDY
Z
ILLUSTRATIONS
25
25
X Y
O 50 10
FV LSV
36
NOTE THE SMALL CHZNGE IN 2ND FV & SV.
DRAW ISOMETRIC ACCORDINGLY.
10
X Y
O FV LSV